Gallon to Liter Converter 2025 | Convert gallon to liter

Gallon to Liter Conversion 2025

Converting gallons to liters is essential for fuel calculations, cooking, and international trade in 2025. This conversion between imperial and metric liquid measurements enables accurate communication between professionals working in different measurement systems, from fuel efficiency calculations to international recipe conversions.

Our 2025 converter provides instant and precise conversions from gallons to liters, essential for automotive professionals, chefs, travelers, and anyone working with liquid volume specifications. 1 US gallon equals approximately 3.78541 liters, while 1 UK gallon equals approximately 4.54609 liters.

How to Convert Gallons to Liters

US Gallon Conversion

1

Take your US gallon value

Example: 5 US gallons

2

Multiply by 3.78541

5 × 3.78541 = 18.92705

3

Get your result

Result: 18.93 liters

Understanding Volume Units

1

US Gallon = 3.78541 L

Standard in United States

2

UK Gallon = 4.54609 L

Imperial gallon (UK, Canada)

3

Liter

Metric volume unit, international standard

Common Gallon to Liter Conversions

US Gallons	Liters	Common Use
1 gal	3.79 L	Large milk jug
5 gal	18.93 L	Water cooler bottle
10 gal	37.85 L	Aquarium size
15 gal	56.78 L	Car fuel tank
20 gal	75.71 L	Large fuel tank
50 gal	189.27 L	Water heater

Quick Conversion Tips for Fuel & Liquid Measurements

1 US gallon = 3.78541 liters (exact conversion factor)
1 UK gallon = 4.54609 liters (imperial gallon)
Quick calculation: US gallon × 3.785 for close approximation
Essential for fuel efficiency, cooking, and international travel

Gallon to Liter Converter

Quick Gallon to Liter Conversion

Gallon to Liter Calculator